Colusa leans Republican by roughly 26 points: about 37% of voters vote Democratic and 63% Republican.
About 54% of adults in Colusa typically vote, below the U.S. average of about 62%. Among adults in Colusa, ~20% vote Democratic, ~34% Republican, and ~46% don't vote. The map below shows estimated turnout by block group.
How Colusa compares
Among cities within 25 miles, Colusa leans more Republican than 5 of 23 neighbors.
Colusa runs about 46 points more Republican than California as a whole. California leans Democratic overall, while Colusa is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Colusa. The northwest side is the most Republican-leaning (R+42) and the east side is the least Republican-leaning (R+16), a spread of about 25 points.
Why Colusa leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Colusa, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 85% of residents in Colusa drive to work alone, about 11 points above the U.S. average of 74%. Colusa runs against the grain of California, a Republican-leaning pocket in a Democratic-leaning state.
High-school completion, developed land, and voter turnout
Places that combine low high-school-completion share and a heavily developed built environment tend to turn out at a lower rate, as Colusa, CA does.
Why turnout in Colusa looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Colusa is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 40% of households in Colusa rent, about 15 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 23% of adults in Colusa report food insecurity, above 87% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Meridian, CA R+49
- Williams, CA R+5
- Maxwell, CA R+40
- Grimes, CA R+33
- Pennington, CA R+51
- Arbuckle, CA R+19
- Sutter, CA R+47
- Sycamore, CA R+41
- Princeton, CA R+51
Cities with Similar Populations
- Farmville, NC D+7
- Uhrichsville, OH R+48
- Colonie, NY D+9
- Jonestown, PA R+53
- Manchester, PA R+30
- Holly Ridge, NC R+39
- Kewaskum, WI R+44
- Ferris, TX R+27
- Slaton, TX R+36
- Apalachin, NY R+16
All Local Stats
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Sources and methodology
Precinct-level voting records used to fit the model come from California Secretary of State, Elections, distributed by the Voting and Election Science Team. Demographic inputs come from the U.S. Census Bureau (ACS 5-year estimates and the 2020 Decennial Census). Health and environmental inputs come from the CDC (PLACES and the Environmental Justice Index). Land cover comes from the USGS and EPA. Election-day and lead-up weather come from PRISM 4km daily grids and the NOAA Global Historical Climatology Network. Mail-voting and election-administration patterns come from the MIT Election Lab's Survey of the Performance of American Elections. Block-group crime detail comes from CrimeGrade. Internet data and modeling support provided by ISPreports.org.
Modeling and analysis by the BestNeighborhood data science team. Full methodology and findings: political spectrum map.
Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.